Method for detecting a tagging compound
AssigneeMorton Thiokol, Inc.
InventorRichard B. Orelup
Life of this patent
Estimating the term…
Abstract
Tagging compounds (which function as both dyes and markers) having the following structures: ##STR1## wherein x is an integer between 0 and 3 inclusive, y is an integer between 1 and 3 inclusive, z is 0 or 1, and R is a straight or branched chain hydrocarbon having from 1 to 5 carbon atoms are disclosed. These compounds can be dissolved in a diluent at a concentration of from about 10 percent to about 30 percent, forming a concentrate which can be further dispersed in an organic liquid to form a final concentration of from about 1 ppm to about 15 ppm of said tagging compound in said liquid. Methods for detecting the presence of a tagged compound in an organic liquid are also disclosed.
Claims2
A method for detecting a tagging compound having a structure selected from the group consisting of:
- ##STR5## wherein x is an integer between 0 and 3 inclusive, y is an integer between 1 and 3 inclusive, and z is 0 or 1, and ##STR6## wherein R is selected from linear or branched hydrocarbons having from 1 to about 5 carbon atoms, comprising the steps of:
- A. providing a sample suspected to contain said tagging compound;
- B. contacting said sample with a reagent comprising:
- i. from about 20 weight percent to about 60 weight percent glycerine;
- ii. from about 20 weight percent to about 40 weight percent water;
- and
- iii. from about 10 weight percent to about 50 weight percent of an organic primary amine to form an admixture therewith;
- C. allowing the admixture to form a sample phase and a reagent phase;
- and
- D. determining whether said reagent phase develops a substantially bluish red or red color, thereby indicating the presence of said tagging compounds.
A method for detecting a tagging oompound having a structure selected from a group consisting of:
- ##STR7## wherein x is an integer between 0 and 3 inclusive, y is an integer between 1 and 3 inclusive, and z is 0 or 1 and ##STR8## wherein R is selected from linear or branched hydrocarbons having from 1 to about 5 carbon atoms, and mixtures thereof, comprising the steps of:
- A. providing a sample of an organic liquid suspected to contain said tagging compound;
- B. passing said sample through an activated alumina chromatographic column;
- C. washing said organic liquid from said column with a solvent therefor;
- D. washing the natural colors of said organic liquid from said column with a solvent therefor;
- and
- E. determining whether a substantially purple zone is formed in said column, thereby indicating the presence of said tagging compounds.
Dependencies are inferred from the claim text.